Twenty-nine states and Washington D.C, have legalized the use of medical marijuana and on top of that, nine states have legalized recreational pot. But the question is, why was it illegal in the first place?
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This April 6, 2018 photo shows the leaves of a marijuana plant inside Ultra Health's cultivation greenhouse in Bernalillo, N.M. Ultra Health on Thursday, April 19, 2018, announced the acquisition of farmland in southern New Mexico where it plans to build another cultivation facility that will include indoor and outdoor operations. The news comes as candidates in New Mexico's gubernatorial race begin to debate the possible expansion of the state's medical marijuana program and legalization of recreational use among adults.(Photo: Susan Montoya Bryan/AP)

Law enforcement will be on high alert Friday, April 20 — otherwise known as "420" aka Weed Day.

This weekend, The Iowa State Patrol announced in a news release Thursday that it be will be joining and participating with other police departments in the state as well as in Arkansas, Kansas, Missouri, Nebraska and Oklahoma in “Driving High? Kiss Your License Goodbye!” — a six-state Drug Impaired Driving enforcement campaign to put an end to drug impaired driving.

"It is never safe to drive when impaired. This not only means refraining from drunk driving, but also from drug-impaired driving," the release said. "If you think driving while high won’t affect you, you are wrong; it has been proven that THC — the chemical responsible for most of marijuana’s psychological effects — slows reaction times, impairs cognitive performance and makes it more difficult for drivers to keep a steady position in their lane.

"The bottom line is this: It doesn’t matter what term is used, if a person is high, stoned, wasted or drunk, he or she is impaired. Driving while impaired by any substance is illegal and can be deadly to the driver and other road users."